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      <h1>Advanced Criteria</h1>
      <p>Advanced criteria help to focus the retrieval to the area of interest.</p>
      <p>Usually, for any given period one is working within a particular domain. Mostly, this domain can be characterized by a few rather general keywords. </p>
      <p>Basically, there are three different classes of such focusing criteria or elements:</p>
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        <li>1. normal focus </li>
        <li>2. mandatory elements </li>
        <li>3. excluding elements </li>
      </ul>
      <p>Any of these elements are used in creating the query. The mandatory and excluding elements are additionally visited in the post-processing and the ranking of the retrieved sources.&nbsp;</p>
      <p>&nbsp;</p>
      <p>Sometimes, however, one would not like to think about such keywords, particularly not regarding the soft, normal context focus. In this case it is possible to provide a whole document as &quot;context&quot;. iTexx will extract the relevant parts of the document&nbsp;by itself.&nbsp;</p>
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